Die head



Nov. 20, 1928.

' s. F. NEWMAN EI'AL DIE HEAD Filed Au 11. 1922 2 Sheets-Sheet 1 X G H QQ Snow W014 amuelFNewmar'l mije5G.HaFPQF Nov. 20, 1928.

S. F. NEWMAN ET AL DIE HEAD 2 Sheets-Sheet 2 Filed Aug. 11, 1922 :wuc -n N14 Samuel F. Newman James G. Harp Patented Nov. 20. 1928.

UNITED STATES PATENT OFFICE.

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' BIGNORS 'ro LANnIs mAonI n coNrANY, or WAYNESBORO, PENNSYLVANIA, A

CORPORATION OF PENNSYLVANIA.

DIE HEAD.

Apfplicatibn filed August 1 Our said invention consists in certain improvements on an automatic stationar die head for cuttin threads in pipes and bolts, certain features eing also applicable in other locations to perform similar functions. The patent to Miller No. 1,296,546, March 4, 1919, shows a somewhat similar structure.

The object of our invention is to provide improved means for opening the cutter jaws o of the head.

Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts,

I Figure 1 1s a face view of the device partly and Figures 6 and 7 details of parts shown in Figure 1.

In ,the drawings 10 indicates a shank having at concentric flange 11, the shank being shown as hollow, though a solid shank may be used if desired. A ring 12 is held against rotation relative to the flange by means of pins including a pair shown at 13 and 14, these pins permitting longitudinal movement of the ring relative .to the shank as in the above mentioned patent. An opening ring 15 is adapted forrotation relative to the parts heretofore enumerated and is movable longitudinally with the ring 12, rotation being normally prevented by'engagement of reduced extensions '16 on the pins with openings in the ring 15 and said openings having renewable hardened bushings 17 The extensions 16 (Fig. 6) are reduced at opposite sides to form arcs of circles corresponding to the circle of the hole in'bushing 17. In this way the sides of the pins fit the inner sides of the bushings with out any line contact. The rings 12, 15, 21 with the flange 11 and the shank 10 constitute supporting means for a body 18 located within said rings and said flange and said body "is adapted to move longitudinally with rings 12, 15 and '21. Relative longitudinal movement between said body and the rings 12 and 15 is prevented by the flange 19 at the forward end and a collar 20 atthe rear end lo-- cated in an annular recess of the-body and:

fixed thereto, said ringbearing against the 1, 1922. Serial No. 581,160.

rear end of a thin ring 21 extending between extension over the flange 11 to close the joint between the adjacent parts. In some cases, and particularly in the smaller heads the ring 21 and collar 20 may be made in one piece. The joint between the body and the shank at the inner side is closed by a bushing 22.

The body has longitudinal bores for supporting trunnions 23 each of which supports a block 24 carrying a cutter or chaser 25 and each block having a pin and slot connection at 26 with the ring 15. By this arrangement a rotary movement of the ring serves to open andclose the jaws while rotary adjustment of the body by means of a worm engaging the worm teeth 27 serves for adjustment of the cutters, the extent of the rotary adjustment being indicated as in our copending application No. 580,210 of even date herewith.

The resistance of the body being'operated on by the cutters may be relied on to open the same but it is preferred to addthereto the so at 28 to accommodate a pin 29'or other suit- L able abutment fixed to the ring 12 and having a flattened end as shown in Figures 1 and 3.- Cylindrical lateral passages 30 lead in opposite directions from the cavity 28 and are threaded adjacent their outer portions. A.

spring 31 fits within either one of said passages according to the direction .of-cut, the

head being provided with either right or lefthand cutters as the exigencies of the situation require. The spring is held in place and the compression'thereof is adjusted by means of threaded plug 32. The oppositeopening is closed by a similar threaded plug-33 to keep out dirt.

InFi 12', 14, 15 and 21 indicate/parts corresponding to those shown in Figures 1, 2 "and 3. In this modification the pin 29' is fixed in -the closing ring 15 and the spring 31 is located in a cavity of the ring 12'. As .in the previous modification the spring is adapted to be in serted from either side to bear against one of the flat sides of pin 29 and at its free end extends into a central recess of a threaded plug second plug 33 engagesa similar ledge at the opposite side of the pin and change of loca 32' engaging a threaded annular ledge 34. A

-No. 580,210'of even date herewith. The head body 18, with rings 15, 12 and 21 are adapted to be moved forward away from flange 1.1

as a unit. As the extensions 16 are freed from bushings 17, the ring 15 due to the back pressureof the'cutters-engaging the work abetted by the action of spring 31 rotates on the body to open the head, and this can be closed bymoving handle 35 to effect a reverse movement of the ring 15. Minor adjustments are made by a worm on ring 12 engaging teeth 27 to rotate the head as in the Miller patent, and the extent of such rotation may be indicated by :a scale on flange 11 and a zero mark on ring 21 which is forced to rotate with the body by a pin 36 locking collar 20 to ring 21, or by any other similar means.

In small dies we prefer to use .trunnions with cutter-holding blocks integral therewith. Pin 13, as 1n my co-pending application No. 580,210, may be arrangedto give a rough and a finishing cut or may be the same aspins 14. These and various other changes may be made in our device without departing from the spirit of the invention, the true scope of which is indicated in the A appended claims.

Having thus fully described our said inyention, what we claim as new and desire to Y secure by Letters Patent, is:

1. In a die head, a body, a shank having a forwardly directed flange, rings carried by the shank surrounding the body and movable therewith longitudinally of the head includ ing a ring rotatable relatively to the body for opening and closing the head, a thin ring next to said flange abutting against a shoulder on the body, and a removable outer collar at therear end of the body abutting against the rear face of said thin ring substantially as set forth.

2. In a die head, a body, a shank having a forwardly directed flange, rings carried by the shank surrounding the body and movable therewith longitudinally of the head including a ring rotatable relatively to the body for opening and closing the head, a thin ring next to said flange abutting against a shoulder on the body, a removable outer collar at the rear end of the body abutting against the rear face of said thin ring, and means for securing said thin ring and said collar to the body whereby said parts are rotatable and adjustable with the body relatively to the remaining parts,,substantia1ly as set forth. 3. A die head comprising a shank, a head body normally rigid therewith, tangential chasers on the head body, a ring rotatable about the head body for opening and closing the die head said ring having a longitudinal opening and alined passages extending therefrom to its periphery, an abutment rigid with the head body said abutment extending into said opening, a coiled springadapted to be,

located 1n either passage to bear against such abutment at its inner end, and means to hold the spring in place in either passage, substantially as setforth.

4. A die head comprising a head body elongated, tangential chasers carried thereby, said chasers having parallel serrations on a long face, rings encircling the body including an oscillatory ring for opening and 210s an oscillatory ring for opening and closing said head, a pin carried by one of said rings sald pin extending into a cavlty in another ring, apassage extending from said cavity to the periphery of the last-named ring, a

spring in the passage, and a plug having threaded engagement with the walls of said passage, substantially as set forth.

6. A die head comprising a shank, a body normally held against rotation relatively thereto, cutters mounted on said body, a plurality of rings encircling said body including-an oscillatory ring for opening and 010- ing said head, a pin carried by. one of said rings said pin extending into a cavity in another ring, oppositely directed passages extending from the cavity-to the periphery of the ring,'a spring adapted to be located in either one of said passages, and a plug adjustable in eitherof said passages to engage the spring and to vary the compression thereof, substantially as set forth.

7. In a die head, a head body, rings surrounding the body, an integral circumferential flange at the end of thebody for holding the rings in place, ashoulder onthe said body, a thin ring surrounding said body and adapted to rest against said shoulder, a thin tioned in a bore extending from the periphery of the other ring and adapted to abut against the said pin for causing relative rotation of' the rings, and a supporting shank for the body bearing against the rearmost ring, said shank being movable axially relatively to said ring, substantially as set forth.

9. In a die head, a head body, an integral circumferential flange at the front end of the body, a ring surrounding the body and held thereon by the said flange and relatively r0- iatable with respect to the head body, additional rings surrounding the head body and secured thereto, a pin fixed in one of said rings and extending into. a cavity in another of said rings, a spring inserted in a bore extending from said cavity to the periphery of said ring and adapted to rest'against the said pin for causing relative rotation of the rings. a shoulder on the body, a thin ring secured to the body and adapted to hold the rearmost ring securely against axi al lllOYQlIlQIlt with re spect to the body, and a SUPPOItlng shank for the body having a flange bearing against the rearmost ring on the body, substantially as set forth.

10. In a die head, a-head body, rings surrounding the body, an integral circumferential flange at the end of the body for holdingthe rings in place, a shoulder on the body, a thin ring surrounding said body and adapted to rest against said shoulder, a second thin ring secured to said body for securing said first-named thin ring in position, and a supporting shank for the body bearing against the rearmost ring, said shank carrying blunt end pins adapted to move into and out of reccsses in the forward ring for engaging and disengaging the ring, substantially as set forth.

11. A die head comprising a body member having a peripheral flange on the front end, a ring surrounding the body and held a ainst axial movement by the flange, a secon ring on the body adjustably fixed thereto, a supporting shank for the body havin a forwardly extending flange surroun ing the rear end of the body, blunt end pins carried by said shank and adapted to seat in recesses in the first-named ring to hold the rings in position during cutting operations, and means comprising a spring seated 1n a peripheral bore for causing relative rotation of the first and second-named rings upon disengagement of the pins from the bores, substantially as set forth.

12. A die head comprising a head body, threading cutters mounted thereon, a plurality of rings encircling said body said rings being connected to said threading cutters and rotatably adjustable relative to the body for controlling the cutting size of said die head, one ring of saidplurality of rings being rotatable independently of said body and the remainder of said rings, for opening the threading cutters, a spring operating between said ring and the remainder of said plurality of rings, whereby upon relative rotation of the said plurality of rings and the said head body for size adjustment the tension of said spring will remain uniform, substantially as set forth.

13. A die head comprising a head body, threading cuttersmounted thereon, a plurality of rings, including an opening ring encircling said head body, said rings being rotatively adjustable relative to the said body to vary the cutting size of said die head, the opening ring being rotatable independently of the remaining rings, a spring mounted between said opening ring and the remainder of said rings for imparting rotative movement to the openin ring for opening the head, said spring maintaining a fixed tension throughout the adjustment of said plurality of rings around said head body for size ad- 'justment, substantially asset forth.

\ In witness whereof, we have hereunto set our hands at Vvaynesboro, Pennsylvania, this twenty-ninth day of July, A. D. nineteen hundred and twenty-two.

SAMUEL F. NEWMAN, JAMES G. HARPER. 

